Safety-pulley.



P. J. A. SGHNOOR.

SAFETY PULLEY. APPLIOATION FILED MARA), 1911.

Patented July 4, 1911.

ATTORN EY CDLUMBIA PLANOGRAPH C0., WASHINGTON, D. c.

PETER J. A. SCHNOOR, OF HOLSTEIN, IOWA.

SAFETY-PULLEY.

Specification of Letters Patent.

Patented 'July 4, 1911.

Application led March 9, 1911. Serial No. 613,339.

To all whom it may concern:

Be it known that I, PETER J. A. SoHNooR, a citizen of the United States,residing at Holstein, in the county of Ida and State of iowa, haveinvented a new and useful Safety-Pulley, of which the following is aspecification.

The invention relates to improvements in safety pulleys.

The object of the present invention is to improve the construction ofsafety pulleys, and to provide a simple, inexpensive and efficient one,designed for hoisting and various other purposes, and equipped with asafety casing, adapted to adjust itself automatically to the flights orstretches of a rope or cable, and capable of effectually preventing thefingers of a person from becoming caught in the pulley.

Vfith these and other objects in view, the invention consists in theconstruction and novel combination of parts hereinafter fully described,illustrated in the accompanying drawing, and pointed out in the claimshereto appended; it being understood that various changes in the form,

proportion, size and minor details of construction, within the scope ofthe claims, may be resorted to without departing from the spirit orsacrificing any of the advantages of the invention.

In the drawing Figure 1 is a side elevation of a safety pulley,constructed in accordance with this invention. Fig. 2 is a horizontalsectional view on theV line 2-2 of Fig. 1. Fig. 3 is a verticalsectional View on the line 3 3 of Fig. 2; Fig. 4 is a transversesectional view on the line 4 4 of Fig. 1. Fig. 5 is a detail perspectiveview of the bail.

Like numerals of reference designate corresponding parts in all thefigures of the drawing.

In the accompanyingl drawing in which is illustrated the preferredembodiment of the invention, 1 designates a sheave or wheel, mounted ona transverse shaft or pivot 2 and arranged within a safety casing,consisting of a main approximately circular shell or section 3 and apivotally adjustable segmental section 4. The main section of the casingis provided atv oneedge with a peripheral opening 5 of a size to permitthe sheave or wheel to be introduced into and removed from the mainsection, which is .also provided at opposite sides with bearing openings6 in which the shaft or pivot 2 is mounted. The pivotal section 4, whichis approximately semi-circular, is of a size to completely cover andconceal the curved peripheral opening of the main section in everyadjustment of the section 4, whereby the fingers of a person areeffectually prevented from becoming caught in the pulley. The adjustablesection 4 is provided at opposite sides with alined openings 7 for thereception of the pivot, and it is adapted to swing on the same toaccommodate itself to the position of the flight or stretch 8 of a ropeor cable 9. rlhe main and adjustable sections of the casing are providedat the bottom with openings 10 and 11 for the passage of the rope orcable 9, and the adjustable section has an enlargement 12, locatedadjacent to the opening 11 and receiving t-he anti-friction wheel 13,preferably grooved and arranged at the outer side of the Hight orstretch 8 of the rope, and adapted to relieve the same of wear. Theinner stretch 14 of the rope 9 extends straight downward from the maincasing, and the outer stretch 8 is adapted to be arranged at diEerent'angles or inclinations, the pivotal section of the casing accommodatingitself to such adjust-ment.

The pivot 2, which is detachable, is secured in place by keys 15 and 16,or other suitable fastening devices, and its terminal portions passthrough alined openings 17 in the sides of a bail 18. One of the sidesof the bail is provided adjacent to the opening 17 with opposite lugs orprojections 19, arranged to engage the key 16 to prevent free rotarymovement of the pivot. The antifriction wheel 13 is mounted on a pivot20, secured in place by suitable keys 21 and 22, and the adjustablesection 4 is provided at one side of the enlargement with an annularfiange or rib 28, having opposite recesses 24, which receive the pin 21for holding the pivot 20l against ro-tary movement. The bail, which hasflat sides and a rounded connecting portion, is detachable and isadapted to be arranged either at the top of thepulley, as illustrated infull lines in the drawing, or it may depend from the bottom of thepulley between the flights of the rope,

as illustrated in dotted lines in Fig. 1 of the drawing.

The main section 3 is provided with a hollow approximately rectangularextension 25, having upper and lower alined openings 2G and pivoted by avertical pin or pivot 2T between horizontally projecting arms 28 of abracket 29, adapted to be secured by bolts 30, or other suitablefasteningl means to a barn or other support. The vertical support 27 isretained in the openings 31 of the arms by keys 32 and 33, and it pel'-mits the pulley to swing horizontally so as to extend in variousdirections from the supporting bracket. The main section 3 is providedat opposite sides adjacent to its bottom opening l0 with oppositeshoulders 34, arranged to be engaged by the bottoni portion of theadjustable Vsection t and'forming stops for limiting the inward swing ofthe bottom portion of the adjustable casing to prevent the same fromcoming in contact with the flight or stretch 14rof the rope 9.

rlhe sheave or wheel 1, which has a grooved periphery, is provided withan interior lubricant chamber 35, and it has a bore or opening 3Gextending from the lubricant chamber to the groove of the wheel andthreaded at the outer' portion for t-he reception of a screw plug 37,but any other form of closure may, of course, be employed. The lubricantcontained in the chamber is adapted to feed outwardly along thehorizontal pivot 2, and it lubricates automati-I cally' the part throughwhich the pivot 2 passes, thereby making the pulley self oiling orlubricating. The screw 37 is readily removable to permit the interiorchamber' 35 to be supplied .with a suitable lubricant, and its outer endis concave to conform to the configuration of the groove of the wheel l,and it is arranged in flush relation with the same when it is at thelimit of its inward movement.

'While the safety pulley is shown arranged in a horizontal position forhoisting, it may be arranged in various other positions and at variousplaces where it is desirable to have a safety or protected pulley. Thebail enables it to be used as one of a double set of pulley blocks, andit will also enable the pulley to be hung from an over-head support.llien the pulley is mounted in a bracket, as shown, it will not dropdown and will turn freely on its vertical pivot, so as to extend in thedesired direction.

Although the sheave or wheel is completely housed within the casing, itmay be quickly removed from the same when desired.

Having thus fully described my invention, what 1 claim as new and desireto secure by Letters Patent,- is

l. A pulley of the class described including asheave or wheel, a safetycasing composed of two relatively movable hollow shells or sectionsincasing the sheave or wheel and provided with openings for the passageof a rope, one of the sections being provided with an opening of a sizeto permit the passage of the sheave or wheel and normally covered andconcealed by the other section, and a pivot passing through andconnect-ing the sections and having the sheave or wheel mounted on it.

2. A pulley of the class described including a sheave or wheel, a safetycasing composed of a main section provided at its periphery with anopening of a size to permit the sheave or wheel to be passed through it,and a relatively movable approximately segmental section fitted over themain section and being of a size to cover the opening of the main casingin every adjustment of the sections, and a shaft pivotally connectingthe sections of the casing and having the sheave or wheel mounted on it.

3. A pulley of the class described including a sheave or wheel, a safetycasing composed of a main section provided at its periphery with anopening of a size to permit the sheave or wheel to be passed through it,and a relatively movable approximately segmental section fitting overthe main section and being' of a size to cover the opening of the maincasing in every adjustment of the sections, said sections being providedat the bottom with opposite openings for the passage of the rope orcable, one opening being in the main section and the other opening inthe segmental section, and a shaft pivotally connecting the sections ofthe casing and having the sheave or wheel mounted on it. Y

t. A pulley of the class described including a sheave or wheel, a safetycasing composed of an approximately circular main shell or sectionprovided at its periphery with an opening of a size to permit the sheaveor wheel to pass through it, an approximately semi-circular relativelymovable shell or section arranged on the main shell or section andcovering the peripheral opening thereof in every adjustment of thesection, and a pivot passing through and connecting the sections andhaving the sheave or wheel mounted on it, said sections being providedwith openings for the passage of a rope, and the main section beingprovided with means for limiting the movement of the other section, toprevent the same from coming in contact with that portion of the ropewhich passes through the opening of the main section.

5. A pulley of the class described including a sheave or wheel, a safetycasing composed of an approximately circular main section provided atone edge with an eXtension having alined openings, said main sectionbeing also provided at the opposite edge with an opening of a size topermit the passage of the sheave or wheel, an automatically adjustablesection fitted on the main section and being of a size to cover the saidopening thereof in every adjustment of the necting the sections andhaving the sheave or Wheel mounted on it, and another pivot passingthrough the openings of the extension of the main section and forming asupport for the pulley.

6. A pulley of the class described including a bracket, a sheave orWheel, a safety casing composed of a main section provided at one sideWith an extension and having 'a peripheral opening at the other side ofa size to permit the passage of the sheave or Wheel, and anautomatically adjustable section itted on the main section and being ofa size to cover and conceal the peripheral opening in every adjustmentof the pulley, a horizontal pivot passing through the sections andconnecting the same and having the sheave or Wheel mounted on it, and avertical pivot connecting the extension ofthe main section to thebracket.

7. A pulley of the class described including a bracket, a sheave orWheel, a safety casingcomposed of a main section provided at one sidewith an extension and having a peripheral opening at the other side of asize to permit the passage of the sheave or Wheel, and an automaticallyadjustable section fitted on the main section and being of a size tocover and conceal the peripheral opening in every adjustment of thepulley, a horizontal pivot passing through the sections and connectingthe same and having the sheave or Wheel mounted on it, and a verticalpivot connecting the extension of the main section to the bracket, saidsections being provided at the bottom With openings for the passage of arope, and the main section having a shoulder forming a stop forlimitingthe movement of the adjustable section.

In testimony, that I claim the foregoing as my ovvn, I have heretoaiixed my signature in the presence of two Witnesses.

PETER J. A. SCHNOOR.

Witnesses:

C. H. Loor, J. C. KUCHEL.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents.

Washington, D. C.

